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Langfuse vs Mailpit

Side-by-side comparison of two indie startups from the Startup Spotlight directory.

Option A
Langfuse

Langfuse

Developer Tools

Open-source LLM engineering platform.

Langfuse provides traces, evals, and prompt management for LLM apps — fully open-source and used by thousands of indie AI builders.

Founder
Maximilian Deichmann
Founded
2023
Team
1-10
Listing
Free (nofollow)
Listed
May 2026
View Langfuse →
Option B
Mailpit

Mailpit

Developer Tools

Email and SMTP testing tool for developers.

Mailpit is an OSS local SMTP server with a web UI for catching dev/staging emails. Built by a solo developer.

Founded
2022
Team
1-10
Listing
Free (nofollow)
Listed
May 2026
View Mailpit →

See more alternatives

Langfuse alternatives →Mailpit alternatives →